This route takes in all of the welsh 3000s but in a non traditional way of north to south making the tallest section the last and with a final summit of Snowdon. This route also is from road to road, rather than peak to peak.

From the first peak of 15 the route follows the traditional welsh 3000s in reverse across the Carneddau Range taking in 7 of the 3000 ft peaks, the last being Pen Y Old Wen, where the route descends into Ogwen valley all the time you have Tryfan staring at you as the next ascent.

The Castle Dome Triathlon starts at the common gathering point of the The Fifth Season (Mt. Shasta's local outdoor equipment and gear store) and involves the mixed discipline of a multi-sport effort, biking to Castle Crags St. Park, moving on foot up the technical Dome Trail from the Vista Point Lookout, and then scrambling the low 5th class Castle Dome before reversing the route and finishing at the Fifth Season back in Mt. Shasta, CA.